I agree, increasing the timer by one second doesn't hurt. And I'll look into uploading the script to Greasy Fork, I didn't know this platform until now. Thanks for sharing! :)
Greasy Fork is a lot more sophisticated and easier to use than OUJS. The StreamCloud Enhancer and all the other scripts moved there. Version 0.1.1 includes your proposed change of waiting one second longer before advancing to the video.
Thanks a lot for your comment, @Alistair1231!
Your Userscript works great. I think if it were on greasyfork you would have more downloads. There is no such userscript. ;)
But from time to time I have to wait 2 times... Maybe set waiting time to 11sec or something :)